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Vishay General Semiconductor - Diodes Division SMCJ51CAHE3/57T
- Part No.:
- SMCJ51CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ51CAHE3/57T.pdf
- Description:
- TVS DIODE 51VWM 82.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,491
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Product details
Overview
SMCJ51CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 51 V standoff voltage (VWM), 82.4 V maximum clamping voltage (VC) at 18.2 A peak pulse current (IPPM), and 1500 W peak pulse power dissipation (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial I/O modules.
For engineers reviewing the SMCJ51CAHE3/57T datasheet, SMCJ51CAHE3/57T pinout, SMCJ51CAHE3/57T application, or SMCJ51CAHE3/57T equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads per terminal.
Technical Context
The SMCJ51CAHE3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its breakdown voltage (VBR) ranges from 56.7 V to 62.7 V at 1 mA test current, with temperature coefficient of 0.104 %/°C - enabling stable transient suppression across -55 °C to +150 °C junction temperature range.
It meets J-STD-020 MSL Level 1 moisture sensitivity and JESD201 Class 2 whisker resistance requirements, with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. The device is RoHS-compliant and AEC-Q101 qualified, targeting automotive-grade reliability without derating up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 51 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 56.7 V / 62.7 V at 1 mA - defines guaranteed avalanche onset window under DC bias |
| VC @ IPPM | 82.4 V at 18.2 A - clamping voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPPM | 1500 W - peak transient energy handling capacity with standardized waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements on PCB |
| AEC-Q101 | Qualified - validated for automotive electronic control units per stress test standard |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; dimensions 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); UL 94 V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward conduction | One terminal of symmetrical bidirectional structure; no polarity marking on device body |
| Cathode | Current exit point in forward conduction | Second terminal; functionally identical to anode under reverse bias due to bidirectional design |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| Glass-passivated junction | Ensures long-term stability and low leakage (<1 μA at VWM) across temperature and humidity |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients by reducing dynamic impedance under surge |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and infotainment power rails |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of LDO regulators and MCU VDD pins. Use Value: Limits transient voltage to ≤82.4 V during 1500 W surges, preventing latch-up or gate oxide damage in downstream ICs. | Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors in factory automation PLC modules from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential signal pairs (e.g., RS-485, CAN FD stubs). Use Value: Symmetrical clamping preserves signal integrity on floating lines while meeting IEC 61000-4-2 Level 4 (±15 kV contact discharge) requirements. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power supplies and data lines in telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS after gas discharge tube (GDT) primary protection, absorbing residual energy. Use Value: 1500 W PPPM rating handles high-energy tail of multi-stage surge events without degradation. | Use Scenario: Clamping input rectifier output in universal-input AC/DC adapters to protect bulk capacitor and controller ICs. IC Role / Device Role / Timing Role: Standoff-rated suppressor across DC bus, triggered only during overvoltage faults (e.g., MOV failure). Use Value: 51 V VWM aligns with 48–54 V nominal DC bus, avoiding false triggering during normal regulation ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC51CA | Lower PPPM (600 W), same VWM (51 V), smaller SMA package (DO-214AC) | Limited to lower-energy transients; unsuitable for automotive load dump per ISO 16750-2 | Select when board space is constrained and surge energy remains below 600 W. |
| 1.5KE51CA | Higher PPPM (1500 W), axial-leaded DO-15 package, non-AEC-Q101 | Requires through-hole assembly; not qualified for automotive under-hood use | Choose for cost-sensitive industrial power supplies where AEC-Q101 is unnecessary. |
Compared with SAC51CA and 1.5KE51CA, the SMCJ51CAHE3/57T uniquely combines AEC-Q101 qualification, SMC surface-mount form factor, and full 1500 W surge capability - making it the only option suitable for automated production of automotive-grade modules requiring zero layout changes for qualification compliance.
Availability
SMCJ51CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECU designs, industrial sensor interface boards, and telecom line card surge protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ51CAHE3/57T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for automotive, industrial, and telecom systems demanding AEC-Q101 validation and consistent clamping behavior across temperature and surge cycles.
FAQ
What is the clamping voltage of SMCJ51CAHE3/57T at its rated peak pulse current?
The SMCJ51CAHE3/57T has a maximum clamping voltage (VC) of 82.4 V at 18.2 A peak pulse current (IPPM), measured using the standardized 10/1000 μs double-exponential waveform. This value ensures downstream circuitry remains within safe operating limits during surge events, and is confirmed in Vishay's Document Number 88394, page 2, Electrical Characteristics table.
Is SMCJ51CAHE3/57T suitable for automotive applications?
Yes, SMCJ51CAHE3/57T is AEC-Q101 qualified and manufactured with HE3 suffix indicating RoHS-compliance and automotive-grade reliability. It is explicitly rated for operation from -55 °C to +150 °C junction temperature and meets MSL Level 1 for reflow compatibility - making it appropriate for engine control units, ADAS camera modules, and body electronics per Vishay's ordering information and qualification notes.
How does the bidirectional configuration of SMCJ51CAHE3/57T affect its use in circuit design?
The bidirectional configuration of SMCJ51CAHE3/57T allows symmetric clamping in both voltage polarities, eliminating the need for polarity awareness during placement. Unlike unidirectional TVS diodes, SMCJ51CAHE3/57T has no cathode band marking and functions identically on AC-coupled lines, differential buses, or floating grounds - simplifying layout and reducing BOM count in designs like RS-485 interfaces or isolated sensor signal paths.
What is the thermal resistance of SMCJ51CAHE3/57T, and how does it impact PCB layout?
The SMCJ51CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). To maintain TJ ≤ 150 °C under worst-case power dissipation, designers must allocate sufficient copper area and avoid excessive trace length - especially critical in high-reliability automotive applications where thermal margin directly affects long-term clamping consistency.
Does SMCJ51CAHE3/57T require special handling or packaging considerations?
No special handling beyond standard ESD-safe practices is required for SMCJ51CAHE3/57T. Its MSL Level 1 rating permits indefinite storage and direct placement into lead-free reflow ovens peaking at 260 °C without pre-baking. The 7" plastic tape-and-reel packaging (57T code) supports high-speed pick-and-place machines, and matte tin-plated leads comply with J-STD-002 and JESD22-B102 solderability standards - ensuring robust manufacturability in volume production.
SMCJ51CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 18.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ51CAHE3/57T FAQ
1.How can I place an order for SMCJ51CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ51CAHE3/57T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCJ51CAHE3/57T reliable?
The price and inventory of SMCJ51CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ51CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ51CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ51CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ51CAHE3/57T?
SMCJ51CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ51CAHE3/57T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCJ51CAHE3/57T?
For technical support, including SMCJ51CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ51CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ51CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ51CAHE3/57T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCJ51CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ51CAHE3/57T?
All SMCJ51CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ51CAHE3/57T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCJ51CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ51CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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